/* Nordettech — feuille de style unique, sans dépendance.
   « Nordet » : le vent du nord-est. D'où la palette — encre, ardoise, écume — et
   la courbe de vent qui traverse le haut de la page. */

:root {
  --encre: #0b1d26;
  --encre-douce: #122b38;
  --ardoise: #46606e;
  --brume: #8ba3b0;
  --ecume: #f7f5f1;
  --blanc: #ffffff;
  --nordet: #0f8f8f;
  --nordet-clair: #14b3ad;
  --nordet-pale: #e6f4f3;
  --ligne: #dfe5e6;

  --rayon: 10px;
  --rayon-lg: 16px;
  --mesure: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--encre);
  background: var(--blanc);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 5.2vw, 58px); font-weight: 800; }
h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 750; }
h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0 0 16px; }
a { color: inherit; }

/* Le vent : un trait qui traverse le haut, discret. */
.vent {
  position: absolute; inset: 0 0 auto 0; height: 620px; overflow: hidden;
  pointer-events: none; z-index: 0;
  background:
    radial-gradient(1200px 380px at 78% -8%, var(--nordet-pale), transparent 62%),
    linear-gradient(180deg, #fbfaf8 0%, var(--blanc) 100%);
}

/* ---------- En-tête ---------- */
.entete {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 22px;
  max-width: var(--mesure); margin: 0 auto; padding: 16px 24px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}
.entete.est-collee { border-bottom-color: var(--ligne); }

.marque { display: flex; align-items: center; gap: 9px; text-decoration: none; font-weight: 800; }
.marque__logo { color: var(--nordet); display: flex; }
.marque__nom { font-size: 19px; letter-spacing: -0.02em; }

.menu { display: flex; gap: 22px; margin-left: auto; }
.menu a {
  font-size: 15px; font-weight: 550; color: var(--ardoise); text-decoration: none;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.menu a:hover { color: var(--encre); border-bottom-color: var(--nordet); }

.langue { display: flex; gap: 2px; padding: 3px; background: var(--ecume); border-radius: 999px; }
.langue button {
  padding: 4px 10px; font: inherit; font-size: 12.5px; font-weight: 700;
  color: var(--ardoise); background: transparent; border: 0; border-radius: 999px; cursor: pointer;
}
.langue button[aria-pressed="true"] { background: var(--blanc); color: var(--encre); box-shadow: 0 1px 3px rgba(11,29,38,.14); }

.menu__bascule { display: none; }

/* ---------- Boutons ---------- */
.bouton {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px;
  font-size: 15px; font-weight: 650; text-decoration: none; white-space: nowrap;
  color: var(--encre); background: var(--blanc);
  border: 1px solid var(--ligne); border-radius: 999px;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.bouton:hover { border-color: var(--ardoise); transform: translateY(-1px); }
.bouton--plein { color: var(--blanc); background: var(--encre); border-color: var(--encre); }
.bouton--plein:hover { background: var(--encre-douce); border-color: var(--encre-douce); }
.bouton--grand { padding: 14px 26px; font-size: 16px; }

/* ---------- Mise en page ---------- */
.bloc { position: relative; z-index: 1; max-width: var(--mesure); margin: 0 auto; padding: 84px 24px; }
.bande { background: var(--ecume); border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); }
.bande--sombre { background: var(--encre); border-color: var(--encre-douce); color: var(--ecume); }
.bande--sombre h2, .bande--sombre h3 { color: var(--blanc); }
.bande--sombre .surtitre { color: var(--nordet-clair); }

.surtitre {
  margin: 0 0 12px; font-size: 12.5px; font-weight: 750;
  letter-spacing: .12em; text-transform: uppercase; color: var(--nordet);
}
.intro { max-width: 62ch; font-size: 18.5px; color: var(--ardoise); }

/* ---------- Accueil ---------- */
.hero { position: relative; z-index: 1; max-width: var(--mesure); margin: 0 auto; padding: 72px 24px 64px; }
.hero__lieu {
  margin: 0 0 18px; font-size: 13px; font-weight: 650; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ardoise);
}
.hero__lieu::before {
  content: ''; display: inline-block; width: 26px; height: 1px;
  background: var(--nordet); vertical-align: middle; margin-right: 10px;
}
.hero__titre { max-width: 17ch; }
.hero__texte { max-width: 60ch; margin-top: 20px; font-size: 19px; color: var(--ardoise); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.chiffres {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px;
  max-width: 760px; margin: 64px 0 0; padding-top: 30px; border-top: 1px solid var(--ligne);
}
.chiffres dd {
  margin: 0; font-size: clamp(28px, 3.4vw, 38px); font-weight: 800;
  letter-spacing: -0.03em; font-variant-numeric: tabular-nums;
}
.chiffres dt { order: 2; font-size: 14px; color: var(--ardoise); line-height: 1.4; }
.chiffres > div { display: flex; flex-direction: column; gap: 4px; }

/* ---------- Cartes ---------- */
.grille-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 34px; }
.carte {
  padding: 26px 24px; background: var(--blanc);
  border: 1px solid var(--ligne); border-radius: var(--rayon-lg);
}
.carte p { margin: 0; font-size: 15.5px; color: var(--ardoise); }
.carte--service { display: flex; flex-direction: column; }
.carte__num {
  display: block; margin-bottom: 14px; font-size: 13px; font-weight: 800;
  letter-spacing: .1em; color: var(--nordet);
}
.carte__livrable {
  margin-top: auto; padding-top: 16px;
  font-size: 14px !important; font-weight: 600; color: var(--encre) !important;
  border-top: 1px solid var(--ligne);
}

/* ---------- Parcours ---------- */
.parcours { display: grid; grid-template-columns: 1.25fr 1fr; gap: 52px; align-items: start; }
.parcours__texte p { max-width: 56ch; color: var(--ardoise); }
.citation {
  margin: 30px 0 0; padding: 4px 0 4px 20px;
  font-size: 19px; font-weight: 600; font-style: italic; color: var(--encre);
  border-left: 3px solid var(--nordet);
}
.parcours__faits {
  padding: 28px 26px; background: var(--ecume);
  border: 1px solid var(--ligne); border-radius: var(--rayon-lg);
}
.parcours__faits h3 { margin-bottom: 18px; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ardoise); }
.liste-faits { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.liste-faits li { display: flex; flex-direction: column; gap: 2px; padding-left: 18px; position: relative; }
.liste-faits li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 7px; height: 7px; border-radius: 2px; background: var(--nordet);
}
.liste-faits strong { font-size: 15.5px; }
.liste-faits span { font-size: 14.5px; color: var(--ardoise); }

/* ---------- Étapes ---------- */
.etapes {
  list-style: none; margin: 40px 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px;
}
.etapes li { position: relative; padding-top: 26px; border-top: 2px solid var(--ligne); }
.etapes li:first-child { border-top-color: var(--nordet); }
.etapes__n {
  position: absolute; top: -15px; left: 0;
  display: grid; place-items: center; width: 28px; height: 28px;
  font-size: 13px; font-weight: 800; color: var(--blanc);
  background: var(--encre); border-radius: 50%;
}
.etapes p { margin: 0; font-size: 15px; color: var(--ardoise); }

/* ---------- Cas ---------- */
.cas { display: grid; grid-template-columns: 1.4fr 1fr; gap: 52px; margin-top: 34px; align-items: start; }
.cas__texte p { color: var(--brume); max-width: 58ch; }
.cas__chiffres {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 0;
  padding: 28px; background: var(--encre-douce); border-radius: var(--rayon-lg);
}
.cas__chiffres > div { display: flex; flex-direction: column; gap: 2px; }
.cas__chiffres dd {
  margin: 0; font-size: 30px; font-weight: 800; color: var(--nordet-clair);
  letter-spacing: -0.03em; font-variant-numeric: tabular-nums;
}
.cas__chiffres dt { order: 2; font-size: 13.5px; color: var(--brume); line-height: 1.35; }

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact .surtitre, .contact h2 { text-align: center; }
.contact .intro { margin-inline: auto; text-align: center; }
.contact__liens { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 30px; }
.contact__note { margin-top: 28px; font-size: 14px; color: var(--ardoise); }

/* ---------- Pied ---------- */
.pied {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  max-width: var(--mesure); margin: 0 auto; padding: 26px 24px 40px;
  font-size: 14px; color: var(--ardoise); border-top: 1px solid var(--ligne);
}
.pied p { margin: 0; }

/* ---------- Écrans étroits ---------- */
@media (max-width: 900px) {
  .grille-3, .etapes { grid-template-columns: 1fr 1fr; }
  .parcours, .cas { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 700px) {
  body { font-size: 16px; }
  .bloc, .hero { padding-left: 18px; padding-right: 18px; }
  .bloc { padding-top: 58px; padding-bottom: 58px; }

  .menu {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    padding: 8px 18px 16px; background: var(--blanc);
    border-bottom: 1px solid var(--ligne);
  }
  .menu:not(.est-ouvert) { display: none; }
  .menu a { padding: 12px 0; border-bottom: 1px solid var(--ligne); }
  .menu__bascule {
    display: grid; gap: 4px; order: 9; margin-left: 4px;
    padding: 8px; background: transparent; border: 0; cursor: pointer;
  }
  .menu__bascule span { display: block; width: 20px; height: 2px; background: var(--encre); border-radius: 2px; }
  .entete > .bouton { display: none; }
  .entete { gap: 12px; }
  .langue { margin-left: auto; }

  .grille-3, .etapes, .chiffres { grid-template-columns: 1fr; }
  .chiffres { gap: 20px; margin-top: 44px; }
  .cas__chiffres { grid-template-columns: 1fr 1fr; }
  .hero__actions .bouton { flex: 1; }
}